Electroacoustic transducer with mechanical impedance transformer
US5635685A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 10, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Aug 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/912
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The transducer comprises for example a block (1) of sensitive elements such as piled piezoelectric disks held up by a stud bolt between two ferrules and a shell (8) all in one piece, that is arranged around the piling with a concave central part (8A) extended on either side by a solid cylindrical part (8 B, 8 C). Two sleeves are arranged at the two opposite ends of the transducer and elastic elements (14) for decoupling them in relation to the vibrating block (1) are interposed. A flexible housing (18) can be placed around the shell (8) so as to insulate from the outside environment the inner volume of the transducer that can be filled with a fluid such as oil. Connecting means allow the vibrating block to be connected to an exciting voltage source. The transducer can be used for the emission of vibrations at sea or in wells and notably petroleum or gas wells for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.